Saw this on a segment from Diners, Drive-ins and Dives, wanted to get the YouTube of it but couldn't find it, took some Qviews of the TV screen that should show it well enough to understand it:
The chef took a #10 can and put in a layer of soaked wood chips on the gas burner on the stove:
Then, once smoke was producing he took a small mini WSM-type grill and placed over the open top of the can:
It had a vent in the bottom as well as in the top.
Then (in this case) he put fish fillets on the grate and put the top back on and let them smoke 5 minutes until flaky:
Voila'! Smoked fish fillets! He flaked them apart and mixed them into a fresh homemade guacamole served in his restaurant that had chopped onion, cilantro and crumbled bacon in it with cored-out avocados mashed to a nice consistency.
Thought it was unique and possibly an alternative for people!